Hi, guys: I wonder how I can download course slides if there is any in linux academy?
Unfortunately, the slides and interactive guides are not meant to be downloaded and are intended for online use only. You can however make screenshots of specific portions of the diagrams and slides as you deem fit.
The slides from the PDFs are generally available by going to the course overview and then clicking on the 'downloads' tab in the course header.
You can also find study guides and other useful material there sometimes!